Lines Matching +full:ts +full:- +full:coeff +full:- +full:h
1 // SPDX-License-Identifier: GPL-2.0-only
3 * ltr501.c - Support for Lite-On LTR501 ambient light and proximity sensor
7 * 7-bit I2C slave address 0x23
12 #include <linux/module.h>
13 #include <linux/i2c.h>
14 #include <linux/err.h>
15 #include <linux/delay.h>
16 #include <linux/regmap.h>
17 #include <linux/acpi.h>
19 #include <linux/iio/iio.h>
20 #include <linux/iio/events.h>
21 #include <linux/iio/sysfs.h>
22 #include <linux/iio/trigger_consumer.h>
23 #include <linux/iio/buffer.h>
24 #include <linux/iio/triggered_buffer.h>
34 #define LTR501_ALS_DATA1 0x88 /* 16-bit, little endian */
36 #define LTR501_ALS_DATA0 0x8a /* 16-bit, little endian */
39 #define LTR501_PS_DATA 0x8d /* 16-bit, little endian */
70 ((vis_coeff * vis_data) - (ir_coeff * ir_data))
94 #define LTR501_RESERVED_GAIN -1
195 return -EINVAL; in ltr501_match_samp_freq()
203 ret = regmap_field_read(data->reg_als_rate, &i); in ltr501_als_read_samp_freq()
208 return -EINVAL; in ltr501_als_read_samp_freq()
221 ret = regmap_field_read(data->reg_ps_rate, &i); in ltr501_ps_read_samp_freq()
226 return -EINVAL; in ltr501_ps_read_samp_freq()
246 mutex_lock(&data->lock_als); in ltr501_als_write_samp_freq()
247 ret = regmap_field_write(data->reg_als_rate, i); in ltr501_als_write_samp_freq()
248 mutex_unlock(&data->lock_als); in ltr501_als_write_samp_freq()
265 mutex_lock(&data->lock_ps); in ltr501_ps_write_samp_freq()
266 ret = regmap_field_write(data->reg_ps_rate, i); in ltr501_ps_write_samp_freq()
267 mutex_unlock(&data->lock_ps); in ltr501_ps_write_samp_freq()
276 ret = regmap_field_read(data->reg_als_rate, &i); in ltr501_als_read_samp_period()
281 return -EINVAL; in ltr501_als_read_samp_period()
292 ret = regmap_field_read(data->reg_ps_rate, &i); in ltr501_ps_read_samp_period()
297 return -EINVAL; in ltr501_ps_read_samp_period()
304 /* IR and visible spectrum coeff's are given in data sheet */
316 lux = LTR501_LUX_CONV(1774, vis_data, -1105, ir_data); in ltr501_calculate_lux()
332 while (tries--) { in ltr501_drdy()
333 ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status); in ltr501_drdy()
341 dev_err(&data->client->dev, "ltr501_drdy() failed, data not ready\n"); in ltr501_drdy()
342 return -EIO; in ltr501_drdy()
347 int ret, i, index = -1, status; in ltr501_set_it_time()
357 return -EINVAL; in ltr501_set_it_time()
359 ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status); in ltr501_set_it_time()
369 return -EINVAL; in ltr501_set_it_time()
373 return -EINVAL; in ltr501_set_it_time()
375 return regmap_field_write(data->reg_it, index); in ltr501_set_it_time()
384 ret = regmap_field_read(data->reg_it, &index); in ltr501_read_it_time()
390 return -EINVAL; in ltr501_read_it_time()
406 return regmap_bulk_read(data->regmap, LTR501_ALS_DATA1, in ltr501_read_als()
419 ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA, in ltr501_read_ps()
435 ret = regmap_field_read(data->reg_als_prst, &prst); in ltr501_read_intr_prst()
446 ret = regmap_field_read(data->reg_ps_prst, &prst); in ltr501_read_intr_prst()
458 return -EINVAL; in ltr501_read_intr_prst()
461 return -EINVAL; in ltr501_read_intr_prst()
472 return -EINVAL; in ltr501_write_intr_prst()
485 return -EINVAL; in ltr501_write_intr_prst()
489 return -EINVAL; in ltr501_write_intr_prst()
491 mutex_lock(&data->lock_als); in ltr501_write_intr_prst()
492 ret = regmap_field_write(data->reg_als_prst, new_val); in ltr501_write_intr_prst()
493 mutex_unlock(&data->lock_als); in ltr501_write_intr_prst()
495 data->als_period = period; in ltr501_write_intr_prst()
505 return -EINVAL; in ltr501_write_intr_prst()
509 return -EINVAL; in ltr501_write_intr_prst()
511 mutex_lock(&data->lock_ps); in ltr501_write_intr_prst()
512 ret = regmap_field_write(data->reg_ps_prst, new_val); in ltr501_write_intr_prst()
513 mutex_unlock(&data->lock_ps); in ltr501_write_intr_prst()
515 data->ps_period = period; in ltr501_write_intr_prst()
519 return -EINVAL; in ltr501_write_intr_prst()
522 return -EINVAL; in ltr501_write_intr_prst()
582 .scan_index = -1, \
636 switch (chan->type) { in ltr501_read_raw()
642 mutex_lock(&data->lock_als); in ltr501_read_raw()
644 mutex_unlock(&data->lock_als); in ltr501_read_raw()
652 return -EINVAL; in ltr501_read_raw()
659 switch (chan->type) { in ltr501_read_raw()
661 mutex_lock(&data->lock_als); in ltr501_read_raw()
663 mutex_unlock(&data->lock_als); in ltr501_read_raw()
666 *val = le16_to_cpu(chan->address == LTR501_ALS_DATA1 ? in ltr501_read_raw()
671 mutex_lock(&data->lock_ps); in ltr501_read_raw()
673 mutex_unlock(&data->lock_ps); in ltr501_read_raw()
680 ret = -EINVAL; in ltr501_read_raw()
688 switch (chan->type) { in ltr501_read_raw()
690 i = (data->als_contr & data->chip_info->als_gain_mask) in ltr501_read_raw()
691 >> data->chip_info->als_gain_shift; in ltr501_read_raw()
692 *val = data->chip_info->als_gain[i].scale; in ltr501_read_raw()
693 *val2 = data->chip_info->als_gain[i].uscale; in ltr501_read_raw()
696 i = (data->ps_contr & LTR501_CONTR_PS_GAIN_MASK) >> in ltr501_read_raw()
698 *val = data->chip_info->ps_gain[i].scale; in ltr501_read_raw()
699 *val2 = data->chip_info->ps_gain[i].uscale; in ltr501_read_raw()
702 return -EINVAL; in ltr501_read_raw()
705 switch (chan->type) { in ltr501_read_raw()
709 return -EINVAL; in ltr501_read_raw()
712 switch (chan->type) { in ltr501_read_raw()
718 return -EINVAL; in ltr501_read_raw()
721 return -EINVAL; in ltr501_read_raw()
733 return -1; in ltr501_get_gain_index()
742 struct ltr501_chip_info *info = data->chip_info; in ltr501_write_raw()
750 switch (chan->type) { in ltr501_write_raw()
752 i = ltr501_get_gain_index(info->als_gain, in ltr501_write_raw()
753 info->als_gain_tbl_size, in ltr501_write_raw()
756 ret = -EINVAL; in ltr501_write_raw()
760 data->als_contr &= ~info->als_gain_mask; in ltr501_write_raw()
761 data->als_contr |= i << info->als_gain_shift; in ltr501_write_raw()
763 ret = regmap_write(data->regmap, LTR501_ALS_CONTR, in ltr501_write_raw()
764 data->als_contr); in ltr501_write_raw()
767 i = ltr501_get_gain_index(info->ps_gain, in ltr501_write_raw()
768 info->ps_gain_tbl_size, in ltr501_write_raw()
771 ret = -EINVAL; in ltr501_write_raw()
774 data->ps_contr &= ~LTR501_CONTR_PS_GAIN_MASK; in ltr501_write_raw()
775 data->ps_contr |= i << LTR501_CONTR_PS_GAIN_SHIFT; in ltr501_write_raw()
777 ret = regmap_write(data->regmap, LTR501_PS_CONTR, in ltr501_write_raw()
778 data->ps_contr); in ltr501_write_raw()
781 ret = -EINVAL; in ltr501_write_raw()
787 switch (chan->type) { in ltr501_write_raw()
790 ret = -EINVAL; in ltr501_write_raw()
793 mutex_lock(&data->lock_als); in ltr501_write_raw()
795 mutex_unlock(&data->lock_als); in ltr501_write_raw()
798 ret = -EINVAL; in ltr501_write_raw()
804 switch (chan->type) { in ltr501_write_raw()
816 ret = ltr501_write_intr_prst(data, chan->type, in ltr501_write_raw()
817 0, data->als_period); in ltr501_write_raw()
834 ret = ltr501_write_intr_prst(data, chan->type, in ltr501_write_raw()
835 0, data->ps_period); in ltr501_write_raw()
842 ret = -EINVAL; in ltr501_write_raw()
848 ret = -EINVAL; in ltr501_write_raw()
866 switch (chan->type) { in ltr501_read_thresh()
870 ret = regmap_bulk_read(data->regmap, in ltr501_read_thresh()
878 ret = regmap_bulk_read(data->regmap, in ltr501_read_thresh()
886 return -EINVAL; in ltr501_read_thresh()
891 ret = regmap_bulk_read(data->regmap, in ltr501_read_thresh()
899 ret = regmap_bulk_read(data->regmap, in ltr501_read_thresh()
907 return -EINVAL; in ltr501_read_thresh()
910 return -EINVAL; in ltr501_read_thresh()
913 return -EINVAL; in ltr501_read_thresh()
927 return -EINVAL; in ltr501_write_thresh()
929 switch (chan->type) { in ltr501_write_thresh()
932 return -EINVAL; in ltr501_write_thresh()
935 mutex_lock(&data->lock_als); in ltr501_write_thresh()
936 ret = regmap_bulk_write(data->regmap, in ltr501_write_thresh()
939 mutex_unlock(&data->lock_als); in ltr501_write_thresh()
942 mutex_lock(&data->lock_als); in ltr501_write_thresh()
943 ret = regmap_bulk_write(data->regmap, in ltr501_write_thresh()
946 mutex_unlock(&data->lock_als); in ltr501_write_thresh()
949 return -EINVAL; in ltr501_write_thresh()
953 return -EINVAL; in ltr501_write_thresh()
956 mutex_lock(&data->lock_ps); in ltr501_write_thresh()
957 ret = regmap_bulk_write(data->regmap, in ltr501_write_thresh()
960 mutex_unlock(&data->lock_ps); in ltr501_write_thresh()
963 mutex_lock(&data->lock_ps); in ltr501_write_thresh()
964 ret = regmap_bulk_write(data->regmap, in ltr501_write_thresh()
967 mutex_unlock(&data->lock_ps); in ltr501_write_thresh()
970 return -EINVAL; in ltr501_write_thresh()
973 return -EINVAL; in ltr501_write_thresh()
976 return -EINVAL; in ltr501_write_thresh()
994 chan->type, val2); in ltr501_read_event()
999 return -EINVAL; in ltr501_read_event()
1002 return -EINVAL; in ltr501_read_event()
1015 return -EINVAL; in ltr501_write_event()
1019 return ltr501_write_intr_prst(iio_priv(indio_dev), chan->type, in ltr501_write_event()
1022 return -EINVAL; in ltr501_write_event()
1025 return -EINVAL; in ltr501_write_event()
1036 switch (chan->type) { in ltr501_read_event_config()
1038 ret = regmap_field_read(data->reg_als_intr, &status); in ltr501_read_event_config()
1043 ret = regmap_field_read(data->reg_ps_intr, &status); in ltr501_read_event_config()
1048 return -EINVAL; in ltr501_read_event_config()
1051 return -EINVAL; in ltr501_read_event_config()
1064 return -EINVAL; in ltr501_write_event_config()
1066 switch (chan->type) { in ltr501_write_event_config()
1068 mutex_lock(&data->lock_als); in ltr501_write_event_config()
1069 ret = regmap_field_write(data->reg_als_intr, state); in ltr501_write_event_config()
1070 mutex_unlock(&data->lock_als); in ltr501_write_event_config()
1073 mutex_lock(&data->lock_ps); in ltr501_write_event_config()
1074 ret = regmap_field_write(data->reg_ps_intr, state); in ltr501_write_event_config()
1075 mutex_unlock(&data->lock_ps); in ltr501_write_event_config()
1078 return -EINVAL; in ltr501_write_event_config()
1081 return -EINVAL; in ltr501_write_event_config()
1089 struct ltr501_chip_info *info = data->chip_info; in ltr501_show_proximity_scale_avail()
1093 for (i = 0; i < info->ps_gain_tbl_size; i++) { in ltr501_show_proximity_scale_avail()
1094 if (info->ps_gain[i].scale == LTR501_RESERVED_GAIN) in ltr501_show_proximity_scale_avail()
1096 len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", in ltr501_show_proximity_scale_avail()
1097 info->ps_gain[i].scale, in ltr501_show_proximity_scale_avail()
1098 info->ps_gain[i].uscale); in ltr501_show_proximity_scale_avail()
1101 buf[len - 1] = '\n'; in ltr501_show_proximity_scale_avail()
1111 struct ltr501_chip_info *info = data->chip_info; in ltr501_show_intensity_scale_avail()
1115 for (i = 0; i < info->als_gain_tbl_size; i++) { in ltr501_show_intensity_scale_avail()
1116 if (info->als_gain[i].scale == LTR501_RESERVED_GAIN) in ltr501_show_intensity_scale_avail()
1118 len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", in ltr501_show_intensity_scale_avail()
1119 info->als_gain[i].scale, in ltr501_show_intensity_scale_avail()
1120 info->als_gain[i].uscale); in ltr501_show_intensity_scale_avail()
1123 buf[len - 1] = '\n'; in ltr501_show_intensity_scale_avail()
1238 ret = regmap_write(data->regmap, LTR501_ALS_CONTR, als_val); in ltr501_write_contr()
1242 return regmap_write(data->regmap, LTR501_PS_CONTR, ps_val); in ltr501_write_contr()
1248 struct iio_dev *indio_dev = pf->indio_dev; in ltr501_trigger_handler()
1252 s64 ts __aligned(8); in ltr501_trigger_handler()
1262 if (test_bit(0, indio_dev->active_scan_mask) || in ltr501_trigger_handler()
1263 test_bit(1, indio_dev->active_scan_mask)) in ltr501_trigger_handler()
1265 if (test_bit(2, indio_dev->active_scan_mask)) in ltr501_trigger_handler()
1273 ret = regmap_bulk_read(data->regmap, LTR501_ALS_DATA1, in ltr501_trigger_handler()
1277 if (test_bit(0, indio_dev->active_scan_mask)) in ltr501_trigger_handler()
1279 if (test_bit(1, indio_dev->active_scan_mask)) in ltr501_trigger_handler()
1284 ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA, in ltr501_trigger_handler()
1295 iio_trigger_notify_done(indio_dev->trig); in ltr501_trigger_handler()
1306 ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status); in ltr501_interrupt_handler()
1308 dev_err(&data->client->dev, in ltr501_interrupt_handler()
1334 ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status); in ltr501_init()
1338 data->als_contr = status | data->chip_info->als_mode_active; in ltr501_init()
1340 ret = regmap_read(data->regmap, LTR501_PS_CONTR, &status); in ltr501_init()
1344 data->ps_contr = status | LTR501_CONTR_ACTIVE; in ltr501_init()
1346 ret = ltr501_read_intr_prst(data, IIO_INTENSITY, &data->als_period); in ltr501_init()
1350 ret = ltr501_read_intr_prst(data, IIO_PROXIMITY, &data->ps_period); in ltr501_init()
1354 return ltr501_write_contr(data, data->als_contr, data->ps_contr); in ltr501_init()
1384 return ltr501_write_contr(data, data->als_contr & in ltr501_powerdown()
1385 ~data->chip_info->als_mode_active, in ltr501_powerdown()
1386 data->ps_contr & ~LTR501_CONTR_ACTIVE); in ltr501_powerdown()
1393 id = acpi_match_device(dev->driver->acpi_match_table, dev); in ltr501_match_acpi_device()
1396 *chip_idx = id->driver_data; in ltr501_match_acpi_device()
1409 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); in ltr501_probe()
1411 return -ENOMEM; in ltr501_probe()
1415 dev_err(&client->dev, "Regmap initialization failed.\n"); in ltr501_probe()
1421 data->client = client; in ltr501_probe()
1422 data->regmap = regmap; in ltr501_probe()
1423 mutex_init(&data->lock_als); in ltr501_probe()
1424 mutex_init(&data->lock_ps); in ltr501_probe()
1426 data->reg_it = devm_regmap_field_alloc(&client->dev, regmap, in ltr501_probe()
1428 if (IS_ERR(data->reg_it)) { in ltr501_probe()
1429 dev_err(&client->dev, "Integ time reg field init failed.\n"); in ltr501_probe()
1430 return PTR_ERR(data->reg_it); in ltr501_probe()
1433 data->reg_als_intr = devm_regmap_field_alloc(&client->dev, regmap, in ltr501_probe()
1435 if (IS_ERR(data->reg_als_intr)) { in ltr501_probe()
1436 dev_err(&client->dev, "ALS intr mode reg field init failed\n"); in ltr501_probe()
1437 return PTR_ERR(data->reg_als_intr); in ltr501_probe()
1440 data->reg_ps_intr = devm_regmap_field_alloc(&client->dev, regmap, in ltr501_probe()
1442 if (IS_ERR(data->reg_ps_intr)) { in ltr501_probe()
1443 dev_err(&client->dev, "PS intr mode reg field init failed.\n"); in ltr501_probe()
1444 return PTR_ERR(data->reg_ps_intr); in ltr501_probe()
1447 data->reg_als_rate = devm_regmap_field_alloc(&client->dev, regmap, in ltr501_probe()
1449 if (IS_ERR(data->reg_als_rate)) { in ltr501_probe()
1450 dev_err(&client->dev, "ALS samp rate field init failed.\n"); in ltr501_probe()
1451 return PTR_ERR(data->reg_als_rate); in ltr501_probe()
1454 data->reg_ps_rate = devm_regmap_field_alloc(&client->dev, regmap, in ltr501_probe()
1456 if (IS_ERR(data->reg_ps_rate)) { in ltr501_probe()
1457 dev_err(&client->dev, "PS samp rate field init failed.\n"); in ltr501_probe()
1458 return PTR_ERR(data->reg_ps_rate); in ltr501_probe()
1461 data->reg_als_prst = devm_regmap_field_alloc(&client->dev, regmap, in ltr501_probe()
1463 if (IS_ERR(data->reg_als_prst)) { in ltr501_probe()
1464 dev_err(&client->dev, "ALS prst reg field init failed\n"); in ltr501_probe()
1465 return PTR_ERR(data->reg_als_prst); in ltr501_probe()
1468 data->reg_ps_prst = devm_regmap_field_alloc(&client->dev, regmap, in ltr501_probe()
1470 if (IS_ERR(data->reg_ps_prst)) { in ltr501_probe()
1471 dev_err(&client->dev, "PS prst reg field init failed.\n"); in ltr501_probe()
1472 return PTR_ERR(data->reg_ps_prst); in ltr501_probe()
1475 ret = regmap_read(data->regmap, LTR501_PART_ID, &partid); in ltr501_probe()
1480 name = id->name; in ltr501_probe()
1481 chip_idx = id->driver_data; in ltr501_probe()
1482 } else if (ACPI_HANDLE(&client->dev)) { in ltr501_probe()
1483 name = ltr501_match_acpi_device(&client->dev, &chip_idx); in ltr501_probe()
1485 return -ENODEV; in ltr501_probe()
1488 data->chip_info = <r501_chip_info_tbl[chip_idx]; in ltr501_probe()
1490 if ((partid >> 4) != data->chip_info->partid) in ltr501_probe()
1491 return -ENODEV; in ltr501_probe()
1493 indio_dev->info = data->chip_info->info; in ltr501_probe()
1494 indio_dev->channels = data->chip_info->channels; in ltr501_probe()
1495 indio_dev->num_channels = data->chip_info->no_channels; in ltr501_probe()
1496 indio_dev->name = name; in ltr501_probe()
1497 indio_dev->modes = INDIO_DIRECT_MODE; in ltr501_probe()
1503 if (client->irq > 0) { in ltr501_probe()
1504 ret = devm_request_threaded_irq(&client->dev, client->irq, in ltr501_probe()
1511 dev_err(&client->dev, "request irq (%d) failed\n", in ltr501_probe()
1512 client->irq); in ltr501_probe()
1516 indio_dev->info = data->chip_info->info_no_irq; in ltr501_probe()
1561 return ltr501_write_contr(data, data->als_contr, in ltr501_resume()
1562 data->ps_contr); in ltr501_resume()
1598 MODULE_DESCRIPTION("Lite-On LTR501 ambient light and proximity sensor driver");